<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <link rel="stylesheet" href="	https://cdn.jsdelivr.net/npm/bootstrap@5.3.0-alpha1/dist/css/bootstrap.min.css">
  <style>
    .red {
      color: red;
    }
  </style>
</head>

<body>
  <div id="app">
    <div class="container">
      <!-- 顶部搜索框模块 -->
      <div class="form-group">
        <div class="input-group">
          <h4>品牌管理</h4>
        </div>
      </div>

      <!-- 数据表格 -->
      <table class="table table-bordered table-hover mt-2">
        <thead>
          <tr>
            <th>编号</th>
            <th>资产名称</th>
            <th>价格</th>
            <th>创建时间</th>
            <th>操作</th>
          </tr>
        

        </thead>
        <tbody>
            <tr v-for="(item , index) in list" :key="item.id">
                <th>{{item.id}}</th>
                <th>{{item.name}}</th>
                <th :class="{red:item.price > 100}">{{item.price}}</th>
                <th>{{item.time}}</th>
                <th> <button @click="del(item.id)">删除</button> </th>
              </tr>
          <tr style="background-color: #EEE" v-show="list.length > 0"  >
              <td>统计:</td>
              <td colspan="2">总价钱为: {{total}}</td>
              <td colspan="2">平均价: {{average === "NaN" ? 0.00 : average}}</td>
        </tr>
        </tbody>
        <tfoot>
          <tr>
            <td  v-show="list.length == 0" colspan="5" style="text-align: center">暂无数据</td>
          </tr>
        </tfoot>
      </table>

      <!-- 添加资产 -->
      <form class="form-inline">
        <div class="form-group">
          <div class="input-group">
            <input type="text" class="form-control" placeholder="资产名称" v-model="name" />
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <div class="form-group">
          <div class="input-group">
            <input type="text" class="form-control" placeholder="价格"   v-model.number="price"/>
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <!-- 阻止表单提交 -->
        <button class="btn btn-primary" @click.prevent="add">添加资产</button>
      </form>
    </div>
  </div>
  <!-- <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script> -->
  <script src="./vue.js"></script>
  
  <script>
    const app = new Vue({
      el: '#app',
      data: {
        name: "", // 名称
        price: 0, // 价格
        list: [
          { id: 100, name: "外套", price: 199, time: new Date('2010-08-12') },
          { id: 101, name: "裤子", price: 34, time: new Date('2013-09-01') },
          { id: 102, name: "鞋", price: 25.4, time: new Date('2018-11-22') },
          { id: 103, name: "头发", price: 19900, time: new Date('2020-12-12') }
        ],
      },
      methods:{
        add() {
          // if(this.name === '' || this.price === '') return alert('请输入内容')
            this.list.push({id:+new Date(),name:this.name,price:this.price,time:new Date()})
            // localStorage.setItem('list',JSON.stringify(this.list))
            
        },
        del(id) {
            this.list = this.list.filter(item => item.id !== id)
        }
      },
      computed:{
        total(){
           return (this.list.reduce((t,c)=>t + c.price,0)).toFixed(2)
        },
        average(){
            return (this.total / this.list.length).toFixed(2)
        }
      },
      // watch:{
      //   list:{
      //     handler(val){

      //       localStorage.setItem('list',this.list)
      //     },
      //     deep:true,
      //     immediate:true
      //   }
      // }
    })
  </script>


</body>

</html>